[The role of alpha adrenergic system in the regulation of pulpal circulation].

Pulpal circulation is microcirculation, whose primary function is to transport the nutritive and return the waste metabolic products. As pulp is surrounded by a solid dentin sheath, proper regulation of its circulation, and of intra- and extracellular fluid levels is of utmost importance for the normal function of the pulp in physiologic conditions as well as for its survival in pathologic states. The alpha adrenergic system with all its components plays a key role in this regulation.